fix: handle underscores in project path generation

Add underscore to the regex pattern in getProjectPath to ensure underscores
are replaced with hyphens, along with existing handling for slashes, colons,
and dots. Includes test case for paths with underscores.

cli/src/claude/utils/path.test.ts

@@ -38,6 +38,12 @@ describe('getProjectPath', () => {
         expect(result).toBe(join('/home/user', '.claude', 'projects', '-var-www-my-site-com-public'));
     });
 
+    it('should replace underscores with hyphens in the project path', () => {
+        const workingDir = '/data/github/hapi__worktrees/ime';
+        const result = getProjectPath(workingDir);
+        expect(result).toBe(join('/home/user', '.claude', 'projects', '-data-github-hapi--worktrees-ime'));
+    });
+
     it('should handle relative paths by resolving them first', () => {
         const workingDir = './my-project';
         const result = getProjectPath(workingDir);

cli/src/claude/utils/path.ts

@@ -2,7 +2,7 @@ import { homedir } from "node:os";
 import { join, resolve } from "node:path";
 
 export function getProjectPath(workingDirectory: string) {
-    const projectId = resolve(workingDirectory).replace(/[\\\/\.:]/g, '-');
+    const projectId = resolve(workingDirectory).replace(/[\\\/\.:_]/g, '-');
     const claudeConfigDir = process.env.CLAUDE_CONFIG_DIR || join(homedir(), '.claude');
     return join(claudeConfigDir, 'projects', projectId);
 }